Although Tony Gonzalez says he will retire after this season, what's to stop him from changing his mind again? (AP Photo)

Last summer, he said he was 95 percent sure he would retire after the 2012 season, his 16th in the NFL. But after having an excellent and healthy year with the Falcons, he reconsidered and signed a two-year, $14 million contract--the second year of which was added for salary-cap reasons.

Although Gonzalez (1,242 career catches) admitted to PFT that he has thought about taking a shot at Jerry Rice's receptions record (1,549), he would have to average more than 100 catches a year for three seasons to accomplish the feat. He had 93 in 2012 and turned 37 in February.

Gonzalez's main motivation for returning is taking another run at the Super Bowl after falling one game short with the Falcons last season. He remains in peak physical condition based on his strict diet and workout routine, but he also plans to take every breather he can while the team goes through its offseason program.

It shouldn't be surprising, however, if Gonzalez has another change of heart and stays in the game beyond 2013. If the Falcons win the Super Bowl, it would make the decision a lot easier to leave on the highest of notes.